Nancy’s friends going on to make lace floor coverings (7)
I believe the answer is:
tatamis
'floor coverings' is the definition.
Both the definition and answer are plural nouns.
Perhaps there's a link between them I don't understand?
'nancy's friends going on to make lace' is the wordplay.
'nancy's friends' becomes 'amis' (I can't explain this - if you can you should give a lot more credence to this answer).
'going on' means one lot of letters go next to another.
'to make lace' becomes 'tat' (to tat is make lace from thread).
'amis' put after 'tat' is 'TATAMIS'.
Can you help me to learn more?
(Another definition for tatamis that I've seen is " More than one mat".)